Ask HN: Does the word "tone" break ChatGPT-4o image analysis on mobile?

I've been testing 4o's ability to analyze conversations by uploading screenshots to the mobile app. When I ask:

"What's the tone of this conversation?"

I consistently get this response:

"Please re-upload the image as a supported format like .jpg, .png, or .webp. The current file type can't be viewed, so I can't assess the tone yet."

However, when I use the exact same image and instead ask:

"How are people feeling in this conversation?"

it responds correctly with an emotional analysis of the screenshot.

Even stranger one is when I type something like:

"I see the tone of the response has changed"

the app just shows the black flashing square (as if it's thinking), but never returns a response.

It seems like the word "tone" might be breaking something in the input parsing or triggering a silent failure. Has anyone else run into this? Could this be a prompt classification edge case or a bug in the image pipeline?